Summary of Main Menu

In order to enter the main menu of the detector place the curved side of the magnet on the side of the enclosure at the 10 o’clock position (see Figure 15) where marked to actuate the magnetic reed switch or press the Cal/Reset switch. Release the magnetic reed switch or Cal/Reset switch after the timer has finished counting down from 10 to 0. In the main menu, the options are displayed and prompted for selection by displaying “YES?”. Momentarily activate the magnetic reed switch or Cal/Reset switch when the desired option is prompted for selection. If the magnetic reed switch or Cal/Reset switch is not activated the Toxic Detector will scroll to the next option. When a selection has been made the selection is acknowledged with a flashing “YES”. If none of the three options are selected, the Toxic Detector returns to the normal operation mode.

Figure 14 - Magnetic Reed Switch

Activation

Enter Main Menu:	10 second timer count down
First Option:	Calibrate Sensor, followed by the “YES?” prompt for selection
Second Option:	Set Relay Option, followed by the “YES?” prompt for selection
Third Option:	Review Settings, followed by the “YES?” prompt for selection
Exit:	Return to normal (if no option is selected)

Enter the main menu and activate the magnetic reed switch/CAL/RESET button when prompted for

“Set Relay Options” with YES?. The selection is acknowledged with a fashing “YES”. The output current will drop to 3.0mA and the micro-processor begins the relay setting procedure. Low alarm level, coil energization and latching options are set for each relay in sequence.

Step 1. The low alarm level is set first. “Set Low” is scrolled across the screen followed by the alarm level setting which increases by increments of 5 (.5 % for the ST1400 O2 sensor) every 2 seconds. Actuate the magnetic reed switch/CAL/RESET button when the desired level is displayed. The selection is acknowledged by flashing the selected level on the alphanumeric display. The range for the low alarm is 5 to 100 (17 - 20.5% for the ST1400 O2 sensor). The value increases in increment of 5 (.5% for the ST1400 O2 sensor) from 5 (17% for the ST1400 O2 sensor) through to 100 (20.5% for the ST1400 O2 sensor) until an alarm level is selected or a 5 minute timer expires in which case the unit returns to normal operation.

Step 2. The coil condition is set under NORMAL status (no alarm present). “Coil Status” is scrolled across the alphanumeric display. The display then alternates between “Energized” and “De-Energized”, each time prompting the user with “YES?” for selection. Activate the magnetic reed switch/CAL/RESET button when the desired action is prompted. The selection is acknowledged by flashing “YES”.

Step 3. The relay latching action is set for ALARM status. “Latch Status” is scrolled on the alphanumeric display. The display then alternates between “Latching” and “Non-Latching”, each time prompting the user with “YES?” for selection. Activate the magnetic reed switch/CAL/RESET button when the desired action is prompted. The selection is acknowledged by flashing “YES”. The alphanumeric display alternates between